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Pupil is the central holes in the iris, is the passage of light enter the eye. Normal pupil is round, both sides and other large, diameter 25 mm, color, like a pool of well water, pitch-dark, the Qing Zhan Zhan's. If the pupil sphincter contraction, while miosis, dominated by the parasympathetic oculomotor nerve; pupil dilatation muscle contraction, the dilated pupils, by the sympathetic innervation. As the light intensity of the pupil can be rather narrow or expand. In normal indoor lighting, if the pupil diameter of less than 1.5 mm or greater than 5 mm, irregular margins, slow response to light, are all sick. Sizes on both sides of the pupil Common in stroke, cerebral thrombosis, brain tumors, etc.; dilated pupils, more common in traumatic brain injury, cerebrovascular disease, and severe cases of Japanese encephalitis, purulent meningitis; miosis, more common in ethanol (also called alcohol) intoxication, hypnotic poisoning and the elderly pons tumor, pontine hemorrhage, also found in diabetes (due to the relaxation and contraction of pupil autonomic regulation of subject, and diabetes lead to autonomic nerve damage, can affect the pupils of the systolic and diastolic function of clinical findings, diabetic pupil smaller than normal). In addition, organophosphate poisoning, can occur miosis, morphine poisoning can occur when the needle-like pupil. Left and right extremes of the pupil size, or not round pupil: contact common in spinal cord nuclear and cerebrospinal syphilis. In open areas, should be "sexually transmitted diseases," Check, early treatment can be cured. White pupil Found in cataract, iridocyclitis, glaucoma, high myopia, or systemic diseases such as diabetes, complications such as tetany can also be caused by trauma. More is to see a cataract, according to statistics, the causes of cataract blindness accounted for first. Cataract, you can find through the cornea appears white in the pupil, which is due to lens opacity occurred sake. Old people with diabetes or eye trauma, can cause cataracts. If the pupil found himself white, should be to eye, a detailed medical examination. Yellow iris By flashlight or light exposure pupil, eyes deep in the issue of a yellow cat's eye reflector as the night, the doctor said this type of eye disease as a "black cat Mongolia", mostly the performance of retinoblastoma. Most of these eye diseases seen in children 7-8 years of age, have a certain familial and hereditary, and high malignancy, such as not treated in time (do enucleation), when the torsion cell spread to the brain, eye foreign or distant when organs can be fatal. A small number of eyes found in purulent (pus vitreous disease) is. Red pupil Common in some eyes eye trauma or bleeding disorders. According to the number of intraocular hemorrhage may have different forms, have varying degrees of vision damage. Hitomi Normal with a certain pressure within the eye, which is maintained within the normal eye blood circulation and metabolism, plays an important role, when the intraocular pressure (eye pressure of the contents of the eyeball wall) is too high occurrence of glaucoma, the cornea may be due to Foggy edema and intraocular series of changes to the issue of a blue green reflective pupil, glaucoma (also known as glaucoma) that was named. Glaucoma patients, the eye becomes like a hard rubber-like eye pain will find themselves falling apart, do not do seek treatment, there is the risk of blindness. Hope the eye is conspicuous Some people move from childhood to muster two eyes (commonly known as goldfish eyes), which is everyone looks different, not sick, but some exophthalmos is a disease. Monocular prominent protrusion of the side of the eye, seriously affect the palpebral fissure when dysraphism. Side of the eye about 50% of the cases highlighted by the brain disorder caused by one of the most common are brain tumors. Prominent eyes, the most common cause of hyperthyroidism is. In addition to exophthalmos in patients, but also accompanied by symptoms such as palpitation and goiter, and the "eyes" bright particular, "flashing" and aggressive. In addition, hypertension, tremor palsy (Parkinson's disease), leukemia, hemophilia can cause proptosis occurred. In addition, the lack of vitamin B vitamin D can cause mild exophthalmos. Many causes of exophthalmos occurred, in addition to the above mentioned diseases, also causes the eye itself, such as high myopia, congenital glaucoma, secondary glaucoma and uveitis caused by limited cornea or sclera grapes swelling, etc. These checks will clear through the ophthalmologist. Recommended hot: I am an expert from tool-cabinet-china.com, while we provides the quality product, such as China Roller Cabinet , Work Bench, Roller Cabinet,and more.
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